We have only Allistair's word for how good Birdy's skills are. Also, they could BOTH be correct to a degree. With the Cenarion Circle in Desolace, Scramble made be getting assistance from someone within the ranks that want Greenbird dead and is using the little goblin for the purpose.

Poor female goblins, they get no respect. <Sir, if you could just get my GENDER correct.>